It took me 4 hours. stopped, but I took my time with a lot of breaks. I had to grind the bolts on the rack. Also, they only measure 1,340. But that's okay because it changes the suspension geometry and raises my truck 2 inches.
Pros
Fitment: 2015-2021 Colorado 2WD 4WD; Canyon 2WD 4WD. NOT suitable for ZR2 models.